Spots on the face may be related to sun exposure, endocrine disorders, heredity, diseases and other factors. 1. Sun exposure: When the skin is exposed to strong ultraviolet rays during sun exposure, it will play its self-protection function and secrete a large amount of melanin to resist the invasion of ultraviolet rays, thus leaving spots on the face. Freckles, sun spots, chloasma, etc. will be aggravated after intense sun exposure. 2. Endocrine disorders: Irregular work and rest, unstable hormone level during pregnancy, long-term mental stress, fatigue, etc. may cause endocrine disorders, which will increase the abnormal secretion of melanin and cause chloasma and other spots to appear on the face. 3. Heredity: the formation of freckles is often related to heredity, if both parents or one of them has freckles, the heredity chance of their children will account for about 50%. 4. Diseases: Diseases such as gynecological diseases, liver diseases, chronic gastritis, tuberculosis, tumor diseases, etc. will affect the hormone level in the body or increase the production of skin pigment particles, which will lead to the appearance of spots on the face. There may be other reasons for having spots on the face, so it is recommended to go to regular hospitals in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of specialists.